A research team finds that a 9-year-old border collie displays a keen facility for learning word meanings, providing new support for the theory that simple types of thinking practiced by some nonhuman animals also make word learning possible in toddlers.

Hunters of the most eagerly sought particle in high-energy physics, the Higgs boson, are gleaning fresh clues about where and how to look from a new finding about another fundamental particle called the top quark.